Air supplement and air intake energy-saving exhaust cabinet

Abstract

The invention discloses an air supplement and air intake energy-saving exhaust cabinet which comprises an exhaust cabinet main body and a protective window. A cavity is formed in the exhaust cabinet main body, a workbench is arranged in the cavity, a top plate is arranged at the top of the cavity, side plates are arranged on the two sides of the cavity, and stand columns are connected to the front ends of the side plates. The air supplement and air intake energy-saving exhaust cabinet further comprises an air supplement and air intake device and an exhaust device which are arranged on the exhaust cabinet main body. The air supplement and air inlet device comprises an air inlet, an air inlet valve, a static pressure box and air inlet pipes. The air inlet valve is arranged at the air inlet. The static pressure box is arranged on the lower portion of the workbench and provided with an air supplementing opening used for supplying air into the cavity, and an auxiliary heating device is arranged in the static pressure box. The air inlet pipes are arranged on the two sides of the exhaust cabinet main body, one ends of the air inlet pipes communicate with the air inlet valve, and the other ends of the air inlet pipes communicate with the static pressure box. The exhaust device comprises an exhaust outlet which is formed in the top plate and an exhaust valve. And the exhaust valve is arranged at the exhaust outlet. According to the exhaust cabinet, the influence of jet flow on a non-uniform flow field can be reduced, the air speed of the air outlet is made uniform, the actual requirement can be met in cold weather, and energy can be saved.

Description

technical field [0001] The invention relates to the technical field of laboratory air exhaust equipment, in particular to an energy-saving exhaust cabinet for supplementary air intake. Background technique [0002] Laboratory exhaust is an indispensable part of laboratory design. In order to prevent laboratory workers from inhaling or ingesting some toxic, pathogenic or unknown toxic chemicals and organisms, there should be good ventilation in the laboratory. To prevent the absorption of some vapours, gases and particles (smoke, soot, dust and aerosols), pollutants must be removed by fume hoods, hoods or local exhaust. [0003] The fume hood is the most commonly used local exhaust equipment in the laboratory. Generally speaking, the top of the fume hood is equipped with an air supply duct and an exhaust duct connected to the outside, and an exhaust duct is arranged between the exhaust duct and the fume hood. The device can discharge toxic and harmful gases to the outside. ...

AI Technical Summary

Problems solved by technology

[0005] The air inlet of the fume cupboard is directly connected to the outside air. In the cold weather in winter in the three northeastern provinces, the temperature of the wind sent into the fume cupboard is basically similar to the temperature of the outside air. The disadvantages caused by this are mainly reflected in the following two aspects: Point: First, the temperature in the fume hood is too low, which affects the experimental data in the fume hood, because most of the experimental materials in the laboratory are greatly affected by the temperature; second, the experimenters are in the fume hood When operating, the hand goes directly into the fume hood, and the hand feels very cold, which affects the use feeling of the fume hood

The current solution is to increase the temperature of the air conditioner in the laboratory in winter, continuously send warm air to the laboratory, and increase the interference air flow in the laboratory. In order to ensure that the inlet wind speed is controlled within a reasonable range, the laboratory gas No leakage, the fume hood needs a large air volume suction device to exhaust air continuously, so a large amount of indoor temperature is discharged from the fume hood, not only the temperature in the laboratory is low, but also the energy consumption of the fume hood and air conditioning system huge

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